焼成ドロマイトけん濁液のヒドロキシラジカル発生に及ぼす焼成温度の影響 Effect of Calcination Temperature on the Hydroxyl Radical Generation of Calcined Dolomite Suspension

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<p>Recently, calcined dolomite has been used as an anti-bacterial material in various applications for improving public health. Generally speaking, calcined dolomite exhibits anti-bacterial effects due to its strong alkalinity after hydration. There are authors who have reported that the calcined dolomite can generate Reactive Oxygen Species (ROS), although there are other authors who were not able to detect it. Since the anti-bacterial mechanism of the calcined dolomite is not yet very clear, it was subject to ESR (Electron Spin Resonance) spin trapping method in order to confirm the generation of the hydroxyl radical. In this work, the hydroxyl radical was detected from calcined dolomite - hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) suspension. It was found that dolomite, calcined at the relatively higher temperature between 800<tt>℃</tt> and 1000<tt>℃</tt>, enables faster H<sub>2</sub>O<sub>2</sub> decomposition. The results of this work indicate that calcined dolomite suspension generates hydroxyl radicals in the presence of H<sub>2</sub>O<sub>2</sub>.</p>

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  • 日本鉱業会誌

    日本鉱業会誌 134(11), 151-157, 2018

    一般社団法人 資源・素材学会

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